first need brain
common sense
trust in me
rooted phone
first goto PS(playstore) para sa mga d alam
download rashr(if you want TWRP recovery just download it and unzip it it has a rashr app)
open rashr
tap'recovery from image'
go to sdcard(or internal mem. or ext sd)/MEGA/MEGA Downloads/(your downloaded recovery image)
NOTE

twrp (with rashr app inside zip):
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halfPHILZ and CWM(recommended)
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it can re root your pop c3 and you can format damaged sdcard and custom format option that lets it clean the system/data/cache/dalvik cache to install new rom
CWM: [Please login or register to view this link]